CN111577795A

CN111577795A - Temperature control system of hydraulic retarder

Info

Publication number: CN111577795A
Application number: CN202010432847.2A
Authority: CN
Inventors: 林承义
Original assignee: Shiyan Hengneng Energy Saving And Environmental Protection Technology Co ltd
Current assignee: Shiyan Hengneng Energy Saving And Environmental Protection Technology Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-08-25

Abstract

The invention discloses a temperature control system of a hydraulic retarder.A inner screw is designed at the axle center part of the tail end of a main shaft of a rotor of the retarder, so that the main shaft is connected with an outer screw bushing. The other end of the lining is connected with a round iron sheet by a screw opening. A set of temperature sensor is designed to measure the oil temperature of the oil storage cavity, when the working condition temperature exceeds the set temperature, the electromagnetic force coil is started to drive the sliding block, and the sliding block is tightly adsorbed on the round iron sheet under the driving of the electromagnetic force coil to complete torque transmission. The torque is used for driving a scroll compressor to compress refrigerant to do work. The main shaft of the compressor is also provided with a group of axial fans for radiating heat for the condenser. The radiator is arranged in the oil storage cavity and directly adjusts the temperature of the medium oil. When the oil temperature is suitable for the working condition, the electromagnetic force coil is powered off, the sliding block stops adsorbing the round iron sheet at the moment, the torque disconnection is realized, and the compressor is stopped immediately. The temperature self-control is realized in such a reciprocating way.

Description

Temperature control system of hydraulic retarder

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to a temperature control system of a hydraulic retarder.

Background

1. The heavy-duty automobile has idle speed brake, exhaust brake and wheel hub brake, and as far as the operating mode is concerned, the capability still can not satisfy the operation requirement, and the former two brake power is weak, has the harm to the host computer, and the latter can generate heat after using frequently and accident. For years, water drenchers are additionally arranged on most social vehicles to cool brake hubs, but the safety of other vehicles can be influenced in use, and for the social vehicles, the cold and hot alternation of the social vehicles can also cause the hidden trouble of accidents after materials crack. With the advance of the GB7258-2017 standard, in recent two years, a hydraulic retarder is taken as an optional part, a small amount of hydraulic retarders are loaded in a main engine plant, and some social inventory vehicles are also automatically loaded.

2. The hydraulic retarder as an auxiliary brake device of an automobile comprises: a working cavity consisting of a rotor and a stator; an oil storage cavity consisting of the front shell and the rear shell; an external control valve; a heat exchanger and two water pipes connecting the heat exchanger to the engine radiator. The components form a hydrodynamic retarder assembly. The medium generates resistance, and the resistance brought to the rotor by the medium oil is the braking torque of the hydraulic retarder. According to the law of conservation of energy, potential energy generated by the gravitational acceleration of the vehicle can be completely converted into heat energy, and how much torque is generated can generate how much heat energy correspondingly, wherein the heat energy needs to be exchanged with the water temperature in the water tank of the engine through a heat exchanger, and finally the heat energy is radiated through a heat radiation system of the host machine. The heat exchanger is a key component of the hydrodynamic retarder.

3. The heat dissipation capacity of the heat dissipation system of the engine has an upper limit in the whole system, but the upper limit is not well determined by the load capacity and the running speed of the vehicle and the motion potential energy caused by the slope, and the speed of generating heat energy in the system and the heat dissipation capacity in unit time are asymmetric.

4. All hydraulic retarder products have an inexhaustible temperature control problem to be solved. The existing solution is that all products are provided with a control program, when the temperature of the medium oil reaches or exceeds 160 ℃, the liquid level of the medium oil in the working cavity is automatically reduced until all the medium oil in the working cavity is emptied, the function is removed, and the temperature is reduced, so that the equipment is protected from being damaged. The working medium runs at the parameter performance boundary in a high-temperature state for a long time, and the data of the brought torque parameters can also drift correspondingly, so that insufficient torque is caused substantially.

5. The heat dissipation of the hydrodynamic retarder is not a problem in theory, and the method of increasing the volume of the heat exchanger to improve the heat exchange rate, increase the heat dissipation capacity of an engine, increase the circulation volume of a water pump, increase the area of a fan blade or improve the rotating speed of the fan, or even directly externally connecting a radiator in series is an effective method. However, as vehicle manufacturing technology continues to develop, the chassis structure of the vehicle is designed to be more compact and utilize less and less space. The important subject of the current whole vehicle design is to optimize the structure and reduce the weight and meet the requirements of performance and function. The existing heat dissipation mode has a complex structure, long lines and a plurality of interfaces, increases the system maintenance frequency and brings challenges to the system stability. And the modification difficulty of social inventory vehicles is also increased.

6. Due to the correlation between the existing hydraulic retarder cooling system and the engine speed, the change of the existing hydraulic retarder cooling system to the driving behavior habit of a driver feels that the following explanation is necessary: when the hydraulic retarder is started, a vehicle is generally in a downhill or idling gear-shifting sliding stage, the rotating speed of an engine is only about 1000 revolutions at the moment, and is even lower, and the heat generated by the hydraulic retarder cannot be solved by the heat dissipation capacity of a water tank. All manufacturers then have operating guidelines: when the hydraulic retarder is started, the rotating speed of the engine is not lower than 1800 revolutions, and some of the rotating speeds are even about 2000 revolutions. Therefore, when the engine runs downhill, a driver needs to downshift to enter the hill, the rotating speed is observed at the moment, and the engine needs to downshift again if the rotating speed is still low until the rotating speed of the engine is matched with the working condition requirement of the hydraulic retarder. In a dangerous road section with heavy load and downhill, the attention of a driver excessively pays attention to the rotating speed, the gear and the temperature, so that the potential safety hazard problem is not ignored.

Disclosure of Invention

The invention aims to provide a temperature control system of a hydraulic retarder.

In order to achieve the purpose, the invention adopts the following technical scheme: a temperature control system of a hydraulic retarder comprises a torque recovery device, wherein the torque recovery device comprises an inner wire which is arranged at the tail end of a connecting stator and a rotor main shaft and is connected with another cylinder, the cylinder penetrates through the joint of a front shell and a rear shell, a sealing ring is arranged in the joint of the shells, a straight rod with an outer wire is arranged at the other end of the cylinder, a disc-shaped iron sheet with the inner wire is arranged on the outer wire of the straight rod, holes are respectively arranged on the left side and the right side of the plane of the iron sheet, a bearing is embedded in the center of the disc-shaped iron sheet, the center of the bearing is a bearing positioning hole of a compressor, an embedded sliding groove is arranged at the front end of the compressor main shaft, a concave sliding block is arranged at the front end of the main shaft with the sliding groove, an annular magnetic coil is arranged in the concave sliding block, an annular fan taking the compressor, the annular fan is provided with two condensers from top to bottom, a liquid storage tank and a throttle valve are arranged on the left side in the middle of the two condensers, an airflow baffle plate is arranged on the right side in the middle of the two condensers, a throttle valve copper pipe penetrates through the airflow baffle plate and extends into an oil storage cavity in the shell, a radiator is arranged in the oil storage cavity, and the radiator is completely soaked by medium oil in the oil storage cavity.

The invention has the beneficial effects that: the recovery torque is adopted to drive the compression refrigerant to refrigerate, and the radiator is arranged in the oil storage cavity to directly regulate the temperature of the medium oil, so that the working condition of the radiator is completely separated from the causal relationship with the rotating speed of the engine. Passive heat dissipation is changed into active refrigeration, so that the hydraulic retarder is guaranteed to always operate at the optimal working condition temperature, and the torque output curve of the hydraulic retarder tends to be stable.

High temperature operation conditions are avoided.

The protective 'functional failure' caused by temperature overrun is avoided.

The structure adopts the integrated design, saves the space of the main engine room, supports the weight reduction of the whole vehicle and simplifies the assembly process.

The simple and convenient operation process shortens the training time of the adaptive operation of the driver; the excessive temperature and speed concerns of the driver are reduced.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a perspective view of the heat dissipating device of the present invention.

FIG. 3 is a schematic diagram of the present invention in a power-off state.

FIG. 4 is a schematic diagram of the present invention in the power-on state.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As the heat dissipation system of the hydrodynamic retarder must be connected in series with the heat dissipation system of the engine, the following problems occur: 1, requiring the rotating speed of an engine to be not less than 1800 revolutions under the working condition; the operating temperature must not reach or exceed 160 degrees celsius, which distracts the driver.

2, due to the working condition of the engine and the property of oil-water heat exchange, the engine runs in a high-temperature state for a long time and at the parameter performance boundary, so that the torque is insufficient and the body is damaged.

3, the whole set of heat dissipation system has long and tortuous pipelines, more interfaces and inconvenient installation, increases the complexity of the whole vehicle assembly process and increases the modification difficulty of the stock vehicles.

The invention makes the use condition of the hydraulic retarder completely separate from the causal relationship with the engine speed; the recovery torque is used as power to effectively control the temperature; the integrated design and installation are simple, and the operation is simple and convenient.

Referring to fig. 1-2, a temperature control system of a hydraulic retarder is divided into a torque source and a temperature control module, and specifically includes a gear 1, a main shaft 2, a rotor 3, a stator 4, an air intake and air conditioning module 5, an air intake duct 6, a non-return device 7, an oil path intake pipe 8, an oil path outlet pipe 9, an oil pump 10, a rear bearing 11, an oil seal 12, an inner wire bush 13, an inner wire disc 14, a positioning bearing 15, a concave slider 16, a magnetic coil 17, an axial fan 18, a scroll compressor 19, a condensation module 20, a compressor refrigerant outlet pipe 21, a compressor refrigerant return pipe 22, a heat dissipation device 23, a radiator refrigerant pipe intake 24, a radiator refrigerant pipe outlet 25, a temperature sensing module 26, a shock-absorbing and heat-insulating pad 27, an oil storage cavity housing 28, a rear cover 29, a screw 30.

The oil path structure has two, a thick oil path inlet pipe 8 and a thin oil path outlet pipe 9. The openings of the oil circuit structures are all arranged at the upper end of the working cavity and are not at the same latitude. The top end of the oil way is provided with a check device 7. The oil path extends downwards to the bottom of the oil storage cavity and is distributed with the radiator left and right.

The center of the gear 1 is provided with a main shaft 2, the diameter of the front end of the main shaft 2 close to the stator 4 is gradually reduced, and the diameter-reducing part of the main shaft 2 is a slope. The rear end of the main shaft 2 connected with the stator 4 is provided with a rear bearing 11, and the rear part of the rear bearing 11 is provided with an oil pump 10. The tail end of the main shaft 2 is provided with an internal thread.

The oil storage chamber housing includes: a reserve chamber body 28 and a rear cover 29. The middle of the oil storage cavity body 28 is provided with an opening, and a sealing ring 31 is arranged in the opening part. The opening part is communicated with the extension line of the tail end of the stator main shaft. The bottom end of the oil storage cavity main body 28 is extended, and a heat dissipation device 23 is arranged in the extended part of the bottom end of the oil storage cavity. The rear cover 29 of the oil storage chamber is a flat plate, and an opening is formed in the middle of the flat plate, overlaps with the opening of the oil storage chamber main body 28, and is communicated with the extension line of the main shaft 2 on the stator 4.

The heat dissipation system is composed of a scroll compressor 19, a condensation module 20, a liquid storage cavity, a throttle valve and a heat dissipation device 23, wherein the heat dissipation device 23 is arranged at the bottom of the oil storage cavity. The scroll compressor 19, the condensation module 20, the liquid storage chamber and the throttle valve are arranged on the rear cover 29, and the connection part of the scroll compressor, the condensation module, the liquid storage chamber and the throttle valve is provided with a rubber heat insulation pad 27.

The working principle of the device is as follows: the integrated temperature control system of the hydrodynamic retarder self-adjusts the temperature of the medium oil in the oil storage cavity according to the working condition requirement. Two states are respectively presented: one is a torque link cooling condition, and the other is a torque off standby condition:

one, as shown in fig. 4, torque-linked cooling conditions: when the temperature of the medium oil sensed by the temperature sensing module exceeds the set temperature, the magnetic coil 17 is electrified to generate a driving force to drive the concave slider 16, and the concave slider 16 is pushed forwards along the groove and tightly adsorbed on the inner thread disc 14 to complete torque linkage. At this time, the scroll compressor 19 starts to compress the refrigerant to do work, and the axial fan 18 simultaneously rotates to radiate heat for the condensing module 20. The heat sink 23 immersed in the high temperature oil starts to bring cold to the medium oil, and the oil temperature starts to drop.

Second, as illustrated in fig. 3, the torque off standby condition: when the temperature of the medium oil is reduced to the set temperature, the magnetic coil 17 is powered off, the magnetic coil loses thrust on the concave slider 16, and the concave slider 16 loses adsorption on the inner wire disc 14 at the same time. At this point the torque link is interrupted and the scroll compressor 19 is immediately shut down.

The invention has the following positive effects:

1. when the hydraulic retarder is started, the temperature of the medium oil rises, and when the temperature upper limit of the system setting is reached, the electric control magnetic coil can be electrified, so that the concave sliding block is pushed to slide forwards along the sliding groove, be adsorbed on the circular iron sheet, and rotate coaxially with the circular iron sheet, and further drive the compressor to do work. At the moment, the driving speed is in direct proportion to the rotating speed of the compressor and the rotating speed of the ring fan, the higher the speed is, the higher the effective power sent by the compressor is, the better the heat dissipation effect of the condenser is, and the more sufficient the cooling capacity of the radiator in the oil cavity is.

2. The design utilizes the recovered torque as a power source, and the cooling and heat dissipation are integrated.

All the developments on the background of the patent technology include but are not limited to a mode of using a compressor to compress a refrigerant to regulate the temperature of a medium liquid;

all developed in the background of this patent art include, but are not limited to, driving the compressor using recovered torque, driving the compressor using an on-board power source, driving the compressor using a main engine, driving the compressor using a pulley drive, and the like.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A temperature control system of a hydraulic retarder is characterized by comprising a torque recovery device, wherein the torque recovery device comprises an inner wire which is arranged at the tail end of a connecting stator and a rotor main shaft and is connected with another cylinder, the cylinder penetrates through the joint of a front shell and a rear shell, a sealing ring is arranged in the joint of the shells, a straight rod with an outer wire is arranged at the other end of the cylinder, a disc-shaped iron sheet with the inner wire is arranged on the outer wire of the straight rod, holes are respectively arranged on the left side and the right side of the plane of the iron sheet, a bearing is embedded in the center of the disc-shaped iron sheet, the center of the bearing is a bearing positioning hole of a compressor, an embedded sliding groove is arranged at the front end of the compressor main shaft, a concave sliding block is arranged at the front end of the main shaft with the sliding groove, an annular magnetic coil is arranged in the concave sliding block, the improved compressor is characterized in that a compressor body is arranged in the middle of the annular fan, two condensers are arranged on the upper portion and the lower portion of the annular fan, a liquid storage tank and a throttle valve are arranged on the left side in the middle of the two condensers, an airflow baffle is arranged on the right side in the middle of the two condensers, a throttle valve copper pipe penetrates through the airflow baffle and extends into an oil storage cavity towards the inside of the shell, a radiator is arranged in the oil storage cavity, and the radiator is completely soaked by medium oil.

2. The temperature control system of the hydraulic retarder according to claim 1, characterized in that a main shaft (2) is arranged at the center of the gear (1), the diameter of the main shaft (2) is gradually reduced near the front end of the stator (4), and the diameter-changing part of the main shaft (2) is a slope; a rear bearing (11) is arranged at the tail end of the rear part of the main shaft (2) connected with the stator (4), and an oil pump (10) is arranged at the rear part of the rear bearing (11); the tail end of the main shaft (2) is provided with an internal thread.

3. A temperature control system of a hydraulic retarder according to claim 1, characterized in that the oil circuit structure has two oil circuit structures, one thick oil circuit inlet pipe (8) and one thin oil circuit outlet pipe (9); the openings of the oil circuit structures are all arranged at the upper end of the working cavity and are not at the same latitude; the top end of the oil way is provided with a check device (7); the oil path extends downwards to the bottom of the oil storage cavity and is distributed with the radiator left and right.

4. A temperature control system of a hydraulic retarder according to claim 1, characterized in that a hole is formed in the middle of the oil storage chamber body (28), and a sealing ring (31) is arranged in the hole; the opening part is communicated with an extension line at the tail end of the stator main shaft; the bottom end of the oil storage cavity main body (28) is extended in an expansion way, and a heat dissipation device (23) is arranged in the expansion part at the bottom end of the oil storage cavity; the rear cover (29) of the oil storage cavity is a flat plate, the middle of the flat plate is provided with a hole, the hole is overlapped with the hole of the oil storage cavity main body (28), and the hole is communicated with the extension line of the main shaft (2) on the stator (4).

5. A temperature control system of a hydraulic retarder according to claim 1, wherein the heat dissipation system is composed of a scroll compressor (19), a condensing module (20), a liquid storage cavity, a throttle valve and a heat dissipation device (23), and the heat dissipation device (23) is arranged at the bottom of the liquid storage cavity; the scroll compressor (19), the condensation module (20), the liquid storage cavity and the throttle valve are arranged on the rear cover (29), and a rubber heat insulation pad (27) is arranged at the connecting part of the scroll compressor, the condensation module, the liquid storage cavity and the throttle valve.

6. The temperature control system of the hydraulic retarder of claim 1,

torque-linked refrigeration conditions: when the temperature of the medium oil sensed by the temperature sensing module exceeds the set temperature, the magnetic coil (17) is electrified to generate a driving force to drive the concave slider (16), and the concave slider (16) is pushed forwards along the groove and tightly adsorbed on the inner thread disc (14) to complete torque linkage; at the moment, the scroll compressor (19) starts to compress the refrigerant to do work, and the axial fan (18) simultaneously rotates to radiate heat for the condensation module (20); at this time, the heat dissipation device (23) soaked in the high-temperature oil starts to remove cold energy for the medium oil, and the oil temperature starts to drop.

Torque off armed condition: when the temperature of the medium oil is reduced to the set temperature, the magnetic coil (17) is powered off, the magnetic coil loses thrust on the concave sliding block (16), and the concave sliding block (16) loses adsorption on the inner wire disc (14) at the same time; at this point the torque link is interrupted and the scroll compressor (19) is immediately shut down.